The new generation of F1 car has significantly reduced downforce at the front end, which has affected the driving.
Champions Kimi Raikkonen and Sebastian Vettel are suffering from similar problems in 2014.
But also notably struggling in 2014 is Sebastian Vettel, the reigning quadruple world champion who has been humbled by Red Bull newcomer Daniel Ricciardo.
“It is true that Kimi and Sebastian seem to have a similar problem with their cars,” Robertson told Finland’s Turun Sanomat newspaper.
“We can only hope that Ferrari is able to resolve it as soon as possible, giving Kimi a car the way he wants it to be,” he added.